canfield



@uiten faire gamut @ffice F. P. OANFIELD, OF BOSTON, MASSACHUSETTS.

l Letters Patent No. 69,540, dated October 8, 1867.

IMPROVED SASH-LOGK AND SUPPORT.

To ALL 'WHoM IT MAY eoNeERN:

Be it known that I, F. P., CANFIELD, of Boston, in the county of Su'olk, and State of Massachusetts, have invented certain new and useful improvements in Sash-Locks and Supports; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings', and to the .letters of reference marked thereon.

The nature of my invention consists in combining with a spring-bolt of a window-lock a peculiarly constructed roller, which, operating on an incline on the face of said bolt, serves as a. window-support.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and use. In the drawings- Figure 1 represents aperspective view of a window-frame and sash having my invention attached.

Figure 2 is a vertical section, showing in full line my invention as it appears when the bolt N N is looked into the recess L L of the window-frame, and in dotted lines -my invention as it appears when acting as a support for the sash when partially raised, the bolt being drawn back.

Figure 3 is a horizontal section.

Figure 4 is an eleva-tion of my invention, showing the friction-roller in dotted lines.

Figure 5 isa. view of the' friction-roller detached from the'other parts.

D D, figs. 1, 2, 3, and 4, represent a metallic case, in which the bolt N N slides, and to which the other parts are secured. E represents a bent lever, pivoted to the case D D by the pin P, iig. 4,-and attached to a start on the back of the bolt N N by means of a pin, H, iig. 2, and a slot, H', iig. 4, so that the bolt N N may he drawn in by taking hold of this lever and pressing it upward. The' bolt is thrown out by the spring S, fig. 4. `The friction-roller, iig. 5, is formed, as shown, of two short cylinders, W W, connected by a pinion, V, of smaller diameter. Byiforming-this roll as above described, I havelthe smooth surfaces of the larger rolls W W to act against the wood-work of the frame, and yet retain the advantages of the notched pinion or axis V. The notches or teeth of the pinion V act in the corresponding notches a: a: made in the web C of the bolt N N,

Ivfig. 4. It will be readily understood, since the web C is always in the groove of the friction-roll W W, the roll cannot slip laterally. Since thc toothed axis .of the friction-roller is smaller than the bearing parts of the roller, the bearing parts will traverse a longer distance than the axis traverses on the web, so that I get the e'ect of a long incline in a short space; also that as there is a deep groove about midway of the roller W W, in,- which the web C fits, the roller will not get out of its proper position, and need not be connected to any other parts. y j

The actionof my invention as a bolt or lock is so simple as not to needparticular explanation. Its action as a frctionsupport for the sash will be understood from inspection of the dotted drawing, iig. 2, wherein the bolt is represented as drawn back, and the friction-roller has rolled partially up the incline, so as to bring sufficient-bearing lupon the frame to insure the support of the sash.

Having thus described my invention, I will proceed to set forth my claim.

What I claim as my invention, and desire to secure by Letters Patent, is

1. I claim the combination, as well as the arrangement, of the friction-roller W W and a bolt, N N, suhstantially as described and for the purpose set forth. i

'2. I claim the friction-roller W W, when made with the two cylinders W W connected by a smaller toothed axis V, in combination with the incline C, substantially as` described and for the purpose set forth.

F. P. CANFIELD.

Witnesses-z A. HUN BERRY. F. G. PARKER. 

